Hi Mellis,
We know of a club that tried using the Bolt Action dice in a bag system, but soon came back to the original method. We understand that some players want a greater fog of war so we encourage players to experiment with their own methods.
One piece of feedback we received from that club, is that in more than one game one player received three or four dice in a row and so was able to take serious, game winning, advantage of that.
We feel that the system we have devised presents a serious tactical choice to the players and leads to a less asymmetric game.